There are a few things about this circuit that i am having problem to understand, this is an open source BLDC motor driver circuit.
This circuit have both sensor-less and sensor circuit but it is upto us what option to use, in my case i am going to use the sensor-less option because my motor does not have place to put hall effect sensor in it so i am using the back emf to make my programming a little bit smarter.
1-Why have they used N-Channel mosfet for both High and Low Side switching?
2-Why the VS(6) pin of IR2101 is attached to the output of the bridge?
3-Why are they using 74HC08 from arduino output to the Mosfet driver High Side input? why not just simple put it directly to the driver High side?
4-Why is shunt resistor used in this circuit?
5-What is the circuit with LM358? what does it do here?
6-What output does the LM339 is going to give when there is a BACK EMF detected?
7-I have studied that we need bootstrap circuit if we want to use N-Channel Mosfet for High side switching but if we are driving it via driver do we still need a bootstrap circuit or not?
This circuit have both sensor-less and sensor circuit but it is upto us what option to use, in my case i am going to use the sensor-less option because my motor does not have place to put hall effect sensor in it so i am using the back emf to make my programming a little bit smarter.
1-Why have they used N-Channel mosfet for both High and Low Side switching?
2-Why the VS(6) pin of IR2101 is attached to the output of the bridge?
3-Why are they using 74HC08 from arduino output to the Mosfet driver High Side input? why not just simple put it directly to the driver High side?
4-Why is shunt resistor used in this circuit?
5-What is the circuit with LM358? what does it do here?
6-What output does the LM339 is going to give when there is a BACK EMF detected?
7-I have studied that we need bootstrap circuit if we want to use N-Channel Mosfet for High side switching but if we are driving it via driver do we still need a bootstrap circuit or not?